SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db131a8a371563a0b64837a6bcd7b958f46a2f65047918f0f2a255b4fe6acd1f' 
  AND token = 'pkZWJZXMvDJ1ltS82y5vUaCEbB0KuBI+a1qKMPzwj5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}